How does a veneer dryer work?

The working principle of the veneer dryer is to use hot air to heat and dry the veneer. The following is a detailed description of the working principle

The veneer dryer consists of a feed port, a drying area, a cooling area, a discharge port, etc.

Feeding: The veneer enters from the feed port of the dryer. After entering the dryer, the veneer is pushed forward by the relative rotation of the internal rollers (the upper roller rotates by its own weight, and the lower roller is kept stationary by the bearing).

Heat source and burner: The veneer dryer uses different heat sources for heating. Common heat sources include heat transfer oil, natural gas, steam, biomass combustion furnace, etc.

Hot air generation: In the furnace, the material (such as heat transfer oil or natural gas) will boil and fluidize to convert into hot air. These hot air are generated by the fluidization and boiling of high-temperature gas in the furnace, with sufficient heat energy.

Hot air supply: The generated hot air is transferred to the veneer dryer through a heat exchanger. The high-temperature hot air is fully in contact with the veneer to complete the drying.

Hot air contacts the veneer: The fan draws hot air from the heat exchanger and blows it toward the veneer. The hot air contacts the surface of the veneer while blowing toward the veneer, transferring heat and heating the veneer.

Temperature control and speed adjustment: The temperature controller and the inverter of the traction motor are connected together, so the speed can be automatically adjusted according to the thickness and moisture content of the veneer to maintain the appropriate veneer travel speed and drying effect.

In summary, the veneer dryer mainly drives the upper and lower rollers to rotate relative to each other through the chain, and uses hot air to heat and dry the veneer. Hot air is generated by the combustion furnace and blown toward the veneer by the fan. The temperature controller and inverter can control the temperature and speed to ensure that the veneer is dried smoothly inside the dryer to achieve better drying effect.